public class Test {
    public static void main(String[] args) {
        friend f1 = new friend();
        f1.setName("一一");
        f1.setAge(-18);
        f1.setGender("女");
        System.out.println(f1.getName());
        System.out.println(f1.getAge());
        System.out.println(f1.getGender());
    }
}
